Watch Pearl Jam Surprise Conan O'Brien Fans in Seattle

There’s no doubt where Pearl Jam’s allegiance lies when it comes to the Conan vs. Leno saga, especially not after two of the band’s members showed up for a surprise performance at Coco’s “Legally Prohibited From Being Funny On Television” Seattle show Monday night.

Audience members certainly got more than they paid for when Pearl Jam frontman Eddie Vedder and guitarist Mike McCready appeared for a series of impromptu serenades, including a reworded version of John Lennon’s “Oh Yoko.” Vedder changed the tune to “Oh Conan” and sang it to celebrate the funnyman’s birthday, which was Sunday.